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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '425') AND (category.subclass = '409') ORDER BY assigned_to ASC, date, patent, type

Total of 1 patents found where: Class is '425'; Subclass is '409';

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T / S Patent Date Description Patentee Category Assigned To
 H. Brunt & Son
U 455,400 July 7, 1891 Manufacture of Knob Molds
Method of forming mold boxes for the manufacture of knobs.
HEADLEY, Harry
Knob H. Brunt & Son

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